Can anything escape from a black hole?

Question

I read that light couldn't.

Answer 1

In classical physics nothing can escape a black hole once it passes the event horizon. At that distance from the black hole the speed needed to escape the black hole is greater than the finite speed of causality. In quantum physics objects can escape a black hole by a process called quantum tunneling. Also, Stephen Hawking realized that black holes can "evaporate" by quantum mechanical processes.

Answer 2

Curly said: "Stephen Hawking has conceded a long-standing bet, and now believes that information can escape a black hole."

I had not heard this. I thought Hawking recognized that virtual pair production can (very slowly) extract the mass from a black hole. The distribution of energy in the escaping particles would closely resemble a blackbody spectral curve: a Planck distribution. Information about what was in the black hole is what would NOT emerge.

Or so I thought. How can I ask Stephen Hawking about this?

Ah, I thought of some exceptions. The Schwarzschild radius indicates the amount of mass that had fallen into the black hole, and observing the amount of frame dragging near the event horizon might reveal the net angular momentum of the mass that fell into the black hole. But these are obvious things that Hawking would have known about for the past 20 years or more. If Hawking has recently conceded a bet, then it must regard information about the mass inside the black hole other than sums of basic physical properties.

What might that be?

Answer 3

Nothing can mechanically escape from a black hole since space and time is so much warped by the intense gravity in its center that even light cannot escape, being light the fastest thing that can move.
Just think as if gravity is pulling into it not only objects around, but space itself, so as light travels outwards, the space it passes through is being pulled back too and thus light gets cushioned to the point that it never reaches our eyes. That's why they're called black holes.
If you want to learn more about them you can read Stephen Hawking's books, in which you may need some little understanding of Einstein's relativity theory.

Answer 4

Nothing that falls into a black hole can escape.

Stephen Hawking redefined black holes as not being totally "black" because the vacuum of the imploding star lets out very tiny amounts of matter and energy in the form of photons, neutrinos and other subparticles. These particles are referred to as Hawking Radiation.

These particles, he said, contained no information about what has been occurring inside the black hole, or how it formed. Under his theory, once the black hole evaporates, all the information within would be lost.

But according to his July 2006 revision, Hawking argues that eventually some of the information about the black hole can be determined from what it emits.

So, in a nutshell, nothing can escape once it goes in, but tiny particles do sometimes escape.

Answer 5

Stephen Hawking has conceded a long-standing bet, and now believes that information can escape a black hole.

Stephen hawking first gave the example of how, by feeding in antimatter from the virtual particle halo around the black hole, mass could be essentially extracted from the black hole until the threshold of critical density was compromised, the black hole ceased to be such, and catastrophically exploded.

Answer 6

No even light can not escape a black hole the gravitational force it exerts is just too powerful even for the speed of light.

Answer 7

each and every thing that is going previous the black hollow's adventure horizon gets trapped interior. there is particularly nowhere else for it to bypass: efficiently, an merchandise previous the shape horizon nicely-knownshows itself in a undertaking the place no count what direction it strikes in, it is moving in direction of the middle of the black hollow. there is not any 'out' anymore. No achieveable paths lead everywhere yet farther in. That mentioned, there's a quantum phenomenon which happens around the shape horizon of a black hollow and reasons it to slowly evaporate. the sunshine that emerges from a black hollow in this style is stated as 'Hawking radiation', after Stephen Hawking, who proposed it.

Answer 8

my understanding is that nothing, not even light can escape a black hole

Answer 9

black holes slowly "evaporate" due to escape of hawking radiation

Answer 10

Light cannot, but I think that some kind of radiation does. Can't remember which it is though, and if you can't be bothered to look it up, neither can I.